"Calibre-Web" matching MCP servers:

A read-only MCP server for an existing Calibre ebook library, enabling metadata search, full-text search, and category browsing via the Model Context Protocol.

Enables read-only search, browsing, and metadata retrieval from a local Calibre e-book library using natural language queries.

Enables AI agents to search and fetch high-quality information from multiple sources, including general web APIs, Wikipedia, arXiv, Hacker News, Stack Exchange, and Crossref, with optional pro-mode deep research and clean markdown page extraction.

Web search (embedded SearXNG), content extraction, and library docs indexing with hybrid search. No API keys required.

Free remote MCP for Core Web Vitals metrics by CMS, CDN, and framework (Chrome field data + multi-site crawl). No auth. Endpoint: https://www.corewebvitals.io/api/state-of-cwv/mcp

Enables AI assistants to perform real-time web and academic searches using Perplexity's Sonar API.

Enables deep research into cryptocurrency tokens by gathering data from multiple sources like CoinGecko and DeFiLlama to generate structured reports. It allows users to track research progress, fetch web content, and manage resources locally for comprehensive crypto analysis.

MCP server for Gramps Web. Gives AI agents structured, tool-based access to family trees through the Model Context Protocol. Built with .NET 8.

Enables AI agents to run WorldQuant BRAIN alpha backtests via MCP, supporting expression submission, status tracking, result analysis, and batch resumption.

Queries Tako to retrieve real-time data and generate visualizations from search queries, uploaded files, or datasets, returning embeddable charts with metadata.

Enables AI assistants to perform web searches, research papers, Twitter searches, company research, URL crawling, and LinkedIn searches using the Exa AI Search API for real-time web information.

Multi-purpose research MCP server integrating web search, deep research, web scraping, research methodology routing, and GPT Researcher report generation.

Enables MCP clients to search, browse, preview, and download CSMAR financial data using institutional IP authentication, no account or password required.

An agent-based tool that provides web search and advanced research capabilities including document analysis, image description, and YouTube transcript retrieval.

MCP server that exposes web_search and web_fetch tools, allowing LLM applications to search the web via DuckDuckGo and fetch page content as cleaned markdown.

MCP server exposing 8 Tavily tools (web search, fetch, crawl, map, QnA, context, and deep research) via Streamable HTTP for AI assistants to perform live web retrieval and research.

Deep Research and Batch Tasks

An MCP server for Perplexity's Agent API, enabling multi-step web research with citations through tools to start, collect, and cancel research runs.

MCP server for Yandex Metrica analytics: query web analytics metrics, goals, conversions, and raw API data using natural language from AI clients like Claude and Cursor.

Enables read and write access to a Zotero library via its Web API, allowing search, create, update, and delete of items, notes, and collections.